// Licensed to Cloudera, Inc. under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  Cloudera, Inc. licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import * as ko from 'knockout';

ko.bindingHandlers.truncatedText = {
  update: function (element, valueAccessor, allBindingsAccessor) {
    const text = ko.isObservable(valueAccessor())
      ? ko.utils.unwrapObservable(valueAccessor())
      : valueAccessor();
    const length = ko.utils.unwrapObservable(allBindingsAccessor().maxLength) || 20;
    let truncated = '';
    if (typeof text !== 'undefined' && text !== null) {
      truncated = text.length > length ? text.substring(0, length) + '...' : text;
    }
    ko.bindingHandlers.text.update(element, () => {
      return truncated;
    });
  }
};
